The 64-bit libjdgaSUNWafb.so should be a symlink to libjdgaSUNWffb.so.
Note the difference between the 32-bit and 64-bit versions:

% cd jre/lib
% ls -l sparc*/libjdgaSUNWafb.so
lrwxrwxrwx 1 10 java_re 17 Aug 19 14:12 sparc/libjdgaSUNWafb.so -> libjdgaSUNWffb.so
-r-xr-xr-x 1 10 java_re 11632 Aug 17 19:35 sparcv9/libjdgaSUNWafb.so

% diff sparcv9/libjdgaSUNWafb.so sparcv9/libjdgaSUNWffb.so
%


Note: if this is ever fixed, the Solaris SVr4 packages must be
updated along with it. See 4456465.